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Who developed the first successful atomic theory?

  • (A) J.J. Thomson
  • (B) Niels Bohr
  • (C) John Dalton
  • (D) Ernest Rutherford

Answer: John Dalton

John Dalton developed the first modern atomic theory, proposing that all matter is made of indivisible atoms.

Who is credited with the discovery of the first law of thermodynamics?

  • (A) James Clerk Maxwell
  • (B) Sadi Carnot
  • (C) Rudolf Clausius
  • (D) Albert Einstein

Answer: Rudolf Clausius

Rudolf Clausius formulated the first law of thermodynamics, which describes the conservation of energy.

Who discovered the concept of electromagnetic waves?

  • (A) Albert Einstein
  • (B) Michael Faraday
  • (C) Heinrich Hertz
  • (D) James Clerk Maxwell

Answer: Heinrich Hertz

Heinrich Hertz discovered electromagnetic waves, confirming James Clerk Maxwells theory of electromagnetism.

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Who developed the theory of classical conditioning?

  • (A) B.F. Skinner
  • (B) Ivan Pavlov
  • (C) Carl Rogers
  • (D) Sigmund Freud

Answer: Ivan Pavlov

Ivan Pavlov developed the theory of classical conditioning, which explains how behavior is learned through associations.

Who is credited with the discovery of radioactivity?

  • (A) Albert Einstein
  • (B) Marie Curie
  • (C) Henri Becquerel
  • (D) Ernest Rutherford

Answer: Henri Becquerel

Henri Becquerel discovered radioactivity in 1896, leading to a deeper understanding of nuclear physics.

Who is credited with the discovery of the heliocentric model of the solar system?

  • (A) Galileo Galilei
  • (B) Johannes Kepler
  • (C) Isaac Newton
  • (D) Nicolaus Copernicus

Answer: Nicolaus Copernicus

Nicolaus Copernicus proposed the heliocentric theory, suggesting that the Sun, not the Earth, is at the center of the solar system.

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Who invented the first practical electric motor?

  • (A) Nikola Tesla
  • (B) Michael Faraday
  • (C) Thomas Edison
  • (D) James Clerk Maxwell

Answer: Michael Faraday

Michael Faraday invented the first practical electric motor, laying the foundation for the development of electric machines.

Who is credited with the discovery of the theory of relativity?

  • (A) Albert Einstein
  • (B) Isaac Newton
  • (C) Niels Bohr
  • (D) James Clerk Maxwell

Answer: Albert Einstein

Albert Einstein is credited with developing the theory of relativity, which fundamentally changed our understanding of space, time and gravity.

Who formulated the theory of plate tectonics?

  • (A) Alfred Wegener
  • (B) Isaac Newton
  • (C) Charles Darwin
  • (D) Marie Curie

Answer: Alfred Wegener

Alfred Wegener proposed the theory of continental drift, which later developed into the theory of plate tectonics.

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Who is known for inventing the first successful computer?

  • (A) Charles Babbage
  • (B) Alan Turing
  • (C) John von Neumann
  • (D) Gottfried Wilhelm Leibniz

Answer: Charles Babbage

Charles Babbage is credited with designing the first mechanical computer, the Analytical Engine, in the 1830s.

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